Great poll, very interesting! I've really only been to 3 of the countries represented (besides the US), so it's hard to say. It does seem like most of the pavilions tend to represent more historical aspects of each region, rather than present day culture. I suppose I'd go with Japan, since you have the traditional architecture and landscaping on the outside, with Western-influenced modern day trends represented in the gallery and the Mitsukoshi's merchandise.
Here you leave today and enter the world of yesterday, tomorrow, and fantasy.